In Reversi, the objective is to fill the board with as many discs of your color as possible. To place a disc, use your mouse to click on an empty spot on the board. The disc can be placed anywhere, as long as it surrounds at least one of your opponent's discs on opposite sides. This can be done horizontally, vertically, or diagonally. When you place your disc, any discs that you surrounded will flip over to your color. If you have more discs of your color than your opponent at the end of the game, you win! If you need help, you can turn on the flip number hint in the options menu. This will show you your possible moves and help you plan your strategy. You can also adjust the difficulty level of the game using the 1 star (easy), 2 star (medium), and 3 star (hard) buttons. Some tips for winning at Reversi include focusing on the corners of the board, looking ahead and planning your moves, being mindful of the number of pieces you have on the board, and avoiding trapping yourself or your opponent. Reversi is a game that requires strategy and spatial reasoning skills, and playing it can help improve these abilities.